Rod-pulling device



Aug. 3 1926. 1 l 1,594,622

P. G. LEONARD y ROD PULLING DEVICE Filed Jan. 7. 1925 sheets-sheet 1 Aug. 3 192s.

1,594,622 P. G. LEONARD ROD PULLING DEVICE Filed Jan; '7, .1925 2 Sheets-Sheet 2 Patented Aug. 3, 1926.

UNITED STATES l ingaan) ra'rsN'r orricaj PETER GUSTAF LEONARD, OF VJEST TUASA, OKLAHOMA. i

Ron-riruma mivicn.

Application filed Januaryy 7, 1925. 4Serial No. 994.

l of the invention is to provide such a device with the gripping elements arranged in one integral piece. Another object is to provide means for conveniently releasing the rod from the device after said rod and device have been drawn to the top of the ground. And another object is to provide a construe* tion in which the integral gripping means is firmly connected to a member adapted to carry and move said means and which inember extends to a locking device for locking the member and gripping means in released position.

Other objects will appear hereinafter.

The invention consists in the. combinations and arrangements of parts hereinafter described and claimed.

The invention"will be best understood by reference to the accompanying drawings forming a part of this specification, and in r which,

Fig. 1 is an elevational view of the device; i

Fig. 2 is a longitudinal section taken on line 2-2 of Fig. 1, showing` the gripping means in released position;

Fig. 3 is a similar longitudinal section, showing the rod gripping means in its active r'od gripping position; Y

Figs. 4 and 5 are transverse sections taken respectively on lines 4-4 and 5--5 of Fig. 3.

Fig. 6 is an elevational view of the gripping means or slips all constructed integral; and

Fig. 7 is an elevational view of the upper attaching member for attaching the device to a suitable instrument or member for opei'ating the same in an oil well.

The form of invention'illustrated in the drawings comprises an outer housing member or casing consisting of a cylindrical member' or barrel 10 and an attaching inem` ber 11 threaded or removably mounted at the upper end of member 1() and provided with an inner bore or chamber 12 having an enlarged lower portion 12 opening tinto the cylindrical member. The upper end of attaching member 11v is provided with oil holes 13 leading into the top of chamber 12, and the cylindrical member is provided with similar suitable oil holes 14. The top of member 11 is threaded for attachment to alifting or operating member, as indicated at 15, and flattened engagingl portions 16- are also provided at the opposite sides of member 11 for engagement by suitable tools.

The Vgrippingmeans or mechanismis constructed in one piece, and preferably -in' cludes a collar 17-with gripping elements or slips made integral with :the collarand consistingof similar Shanks 18 which are formed by cutting away portions to provide spaces 18', and sa-id Shanks have enlarged portions or gripping-jaws 19 at their lower ends provided with transversely extending ridges or teeth on the' inside for engaging and Abiting into a rod 20, as 'shownin Fig. 3, to grip or clamp the'rodbetweensaid elements 19 within the device as said elements move downwardly infbarrel 10 and are forced inwardly between inwardly bev-y elled or thickened lower portion 21 of' said barrel.

automatically moving it to operative position when unlocked, Acomprises a carrying memlber whie'h contains a lower tubular member 22, threaded or removably mounted on collar `1'?, and an upper Vstein 23 which extends to a locking means in the 'form of a dog 24 slidably mounted in apoelret 11 inthe Wall of attaching member 11, and which with its tip 24 engages beneath the under-eut ledge of a head 23 on stem 23, as shown in Fig. 2. A pin 25, mounted in the wall of member 11 extends through a groove in the head of said dog to prevent removal thereof, and a spring 26 normally retains said dog in released position, as shown in Fig. 3. A coil spring 27 is mounted on stem 23, within chamber 12 and bears on a flange 28, between the tubular portion 22 and stem 23, to automatically move the Vgripping means into operative or rod gripping position when the locking means is released. A

removable adjusting screw 29 is threadedV in the lower tubular part 22 to be engaged by the rod for moving the mechanism into released position to be locked therein by said dog 24, especially when the rod is to be withdrawn from the device, and at other times as may be found desirable.

. endof said member to be 'engaged by a rod therefore, do Vnot wish to be limited to the precise details 'of construction set forth, but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

Having described my invention, what I claim as new and desire to secure by Letters Patent is: l

l. A rod pulling device comprising a casing, a member .housed in said casing 'and having gripping elements mounted thereon and therewith movable in said'casing, a dog mounted in the wallet .said casing and having. a projecting -tipl for engaging behind a projection on said member to hold sai-d ele-` kmounted thereon and movable in said casing,

a ldog for engaging .sa-id mem-ber to :hold

Vsaid elements in release position, a spring on said dog for retracting it upon an upward movement of said member, fand :an adjustable contact element mounted at the low-er for moving said member upward.

3. A rod pulling device comprising -a casing, a .member slidably mounted therein, rod ygripping meafns mounted -on said member, means comprising ya body arranged in the casi-ng `and movable finto position for lo'ckingsaid member and gripping 4.means fi-n release position, .and 'an adjustable contact element mounted at the lower end of .said

removably-mounted thereon and forming a v complete casing therewith, a member housed and slidably mounted in said casing, rod gripping elements constructed in a single piece and removably mounted on said member to slide therewith, adog with projecting tip for engaging and locking said memberand therewith said gripping elements in release posi-tion, andaspringsurrounding said dog .for retracting and holding it in release position when said member has been moved upwards.

5. A rod pulling device comprising an vupper attaching portion with a chamber therein, a cylindrical means mounted thereon and for-ming a lcasing wi-th said chamber, a stem with a tubular portion slidably mounted in said casing, integral-gripping elements removably mounted onv said tubularportion, a detachable contactv .element adjustably mounted in said tubular portion, to be engaged .by a rod for movingsaid portion and stem upward, a dog mounted i-nsaid upper attaching .portion for engaging said stem to lock said gripping elements inrelease Eposition, a spring on said dog for lmoving it into release position, and ya spring on said ystem for moving said elements into locking position upon release of said vlocking dog. o

lin ytestimonywhereof I Ahave signed my name to this specification.

PETER GUSTAF LEONARD. 

